How long until my published site is viewable? I hit publish my URL still shows nothing?

Hello-

Thanks for reaching out, I’m sorry you’re not seeing your website as expected.

Can you provide a little more detail about your issue? Are you clicking “Publish” in the Customize menu, or on a post or page? 
I can think of a couple of reasons you might not see your content published immediately, for example, if you are using a Page Caching plugin or if your server uses a reverse-proxy cache, or possibly if you’re using a CDN like CloudFlare.